//---------------------------------------------------
// This function loads the parts of your skeleton 
// (navbar, footer, and other things) into html doc. 
//---------------------------------------------------
function loadSkeleton() {
    var user = JSON.parse(localStorage.getItem("loggedinUser"));
    if (user) {
        console.log($('#navbarPlaceholder').load('./text/nav_after_login.html'));
    } else {
        console.log($('#navbarPlaceholder').load('./text/nav_before_login.html'));
    }
    console.log($('#footerPlaceholder').load('./text/footer.html'));
}
loadSkeleton(); // 调用函数了